Read the sentences from the "Ellis Island Oral History Project" excerpt.

How do you find the boundary layer thickness of a pipe?

QveST [7]

The boundary layer thickness is usually defined as the distance from the wall to the point where the flow velocity reaches 99 % of the free stream value.

In the very thin boundary layer associated with free stream flows with high Reynolds numbers, a steep rise in velocity occurs perpendicular to the wall.

Boundary layer thickness = 0.37*Distance on x-axis/(Reynolds Number^(1/5))

δ = 0.37*x/(Re^(1/5))

This formula uses 3 Variables:

Variables Used

Boundary layer thickness - (Measured in Meter) - Boundary layer thickness is the distance normal to the wall to a point where the flow velocity has essentially reached the 'asymptotic' velocity.

Distance on x-axis - (Measured in Meter) - Distance on x-axis is the distance of point measured along x-axis form origin.

Reynolds Number - The Reynolds number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid velocities. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.

Learn more about Boundary Layer Thickness on:

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3 0

1 year ago

Which of the following is an example of fixed ratio reinforcement schedule?a.feeding your fish every day at 8 a.m.b.checking you

Vilka [71]

Answer:

Option C.

Explanation:

A fixed-ratio schedule is one that offers a reward every X amount of responses. This number will always be the same to create a habit.

The fixed ratio in this example is 10. Every 10 responses, you receive a reward within the game.

This leads to steady and constants responses until the reward is delivered.

8 0

3 years ago

For all the seven wonders of the ancient world, answer the following : When was it built? Where was it located? What was it's pu

OLEGan [10]

These are the seven wonders of the ancient world:

The Great Pyramid at Giza, Egypt was constructed between 2584 and 2561 BC. It is located in Giza, Egypt. Pyramids were made to serve as tomb for the pharaohs and their queens. In this case it was built for Egyptian Pharaoh Khufu or Cheops. It is believed by some that the architect was Hemiunu also known as Hemon.

The Hanging Gardens of Babylon were build between 605-562 BC by King Nebuchadnezzar II as a gift to his wife. They were located in the ancient city of Babylon in Iraq.

The Statue of Zeus at Olympia, Greece was built from 430 to 422 BC by a Greek sculptor named Phidias. It was placed in the Temple at Olympia Greece. It was made to honor Zeus the king of Greek gods. The statue was later carried to Constantinople where it was later destroyed by an earthquake.

The Temple of Artemis at Ephesus was completed by 550 BC, it took 120 years to built. It was located in Ephesus, a Greek colony in Asia Minor, now in western Turkey. It was sponsored by the King Croesus of Lydia with the purpose of honoring Artemis, one of the three main goddesses of Olympus.

The Mausoleum at Halicarnassus was built in 351 BC it is in Halicarnassus, Persia (now Turkey). It was the tomb of Persian Satrap Mausolus. It was built by his wife Artemisia II. It was used as the tomb of Mausolus and later the ashes of his wife Artemisa were entombed with him in the mausoleum. The structure was designed by Greek architects Satyros and Pythius of Priene.

The Colossus of Rhodes is a statue of the god Helios, the patron god of the island of Rhodes, Greece. It was built between 292 and 280 BC by Chares of Lindos. It was made to celebrate Rhodes’ victory over the ruler of Cyprus.

The Lighthouse of Alexandria, located in the island of Pharos, Egypt. Construction was completed around 280 BC. It was built in the island of Pharos ordered by Ptolemy Soter. Its purpose was to serve as a lighthouse or guide for ships getting into the busy harbor of Alexandria, Egypt. It was one of the tallest man made structures of the ancient world.

8 0

3 years ago

Closely examine the Great Depression in 1929

Maslowich

Economic euphoria in the United States began in the early 1920s, where large companies began to invest in bonds on the stock market. The economy showed an infinite sea of possibilities. Exaggerated consumption, high profits and the whole culture of the American Way of Life. A whole culture built on the pillars of market and consumption.

However, from this growth was projected that crisis that is considered as the largest that Capitalism has ever faced. A systemic crisis, where the hitherto winning capitalist model decays. The economy that largely revolved around stock market speculation, and therefore artificial, thus found its limit and breaks at the time of the "New York Stock Exchange" on October 24, 1929.

The main factors leading to the crash were the result of the economic euphoria itself. The increase in consumption caused industries to increase their production as well, however at some point there was no longer a market for such a large production which caused countless industries to fail because they could not sell their productions.

Another factor of the great crisis was agricultural overproduction. The agricultural market as well as the industries, accompanying the growth of consumption began to produce more than the market could absorb. Mainly wheat production was affected by the downturn in the market.

3 0

3 years ago

What will most likely change our ways of communicating in the future?

sladkih [1.3K]

Answer:

Technology

Explanation:

Technology is always changing and improving. It will change the way we communicate and make it easier and faster.

3 0

3 years ago